Module Tidbits
I always forget what including versus extending a Module, so here's a little reminder for myself.
module UsefulMethods
def some_cool_thing
1 + 1 == 0
end
end
class IncludeUsefulInstanceMethods
include UsefulMethods
end
class IncludeUsefullClassMethods
extend UsefulMethods
end
puts IncludeUsefulInstanceMethods.new.some_cool_thing # => false
puts IncludeUsefullClassMethods.some_cool_thing # => false
So, including a module basically shoves the module's methods into the class as instance methods, while extending a module puts them in as class methods.
That's it. By the way, this was inspired by Dave Thomas' metaprogramming talk at the Rails Edge Studio in Denver.
Daniel Wanja
HTML5, iOS and Ruby On Rails Nouvelles Solutions, Inc.
d@n-so.com
